I know exactly what you mean, but i guess that to progress a story with so many characters and intricacies, some tribe drama is a necessary evil, maybe the second game is just aloy recruiting an army of ex-enemies to fight the big bads in the third game?!
They can't hire angela basset to voice regalla if his character is a throw away villain...
talking about something else, this screen kinda confirms that MMA is a thing in the world of horizon, look at kotallo's ear and then look at aloy's ear.
I bet that he developed califlower ears doing wrestling in college